Upgrade Observatory to Polymer 0.10.x

runtime/bin/vmservice/client/web/main.dart

Index: runtime/bin/vmservice/client/web/main.dart
diff --git a/runtime/bin/vmservice/client/web/main.dart b/runtime/bin/vmservice/client/web/main.dart
index db5153ceb9803579d5be5e462ce89db09a3c4d8c..26de4a317bc261430c51a73d67566d2b7e3233cf 100644
--- a/runtime/bin/vmservice/client/web/main.dart
+++ b/runtime/bin/vmservice/client/web/main.dart
@@ -6,7 +6,8 @@ import 'package:logging/logging.dart';
 import 'package:observatory/app.dart';
 import 'package:polymer/polymer.dart';
 
-main() {
+@initMethod
+init() {
   Logger.root.level = Level.INFO;
   Logger.root.onRecord.listen((LogRecord rec) {
       if (rec.level == Level.WARNING &&
@@ -19,9 +20,7 @@ main() {
       print('${rec.level.name}: ${rec.time}: ${rec.message}');
   });
   Logger.root.info('Starting Observatory');
-  GoogleChart.initOnce().then((_) {
-    // Charts loaded, initialize polymer.
-    Logger.root.info('Initializing Polymer');
-    initPolymer();
-  });
+  Polymer.onReady.then((_) => GoogleChart.initOnce().then((_) {
+    Logger.root.info('Polymer Ready.');
+  }));
 }